fixed "shipment generate --name"
save args and kwargs to shipment
added utils.resource_stream
more detailed output when unable to load shipment from file
SourceFile: preserve attributes (e.g. mode) for file-like objects
Shipment: added expose_ports method, Ship: expose_all renamed to expose_ports
Shipment:images: added docstring
fixed typo (cassete -> cassette)
removed requests_cache support
actions.remove: added --force flag
Shipment: allow to skip any __init__ arguments
Shipment: added load/save method
Shipment: added unload_ships method
actions refactored to allow working with less options and use single script file instead of obedient package
Shipment: user "unnamed" name by default
fixed tests
Bump version: 11.6.0 → 12.0.0
actions: "edit execute" use "build" function by default
print traceback with local vars for unhandled exceptions
do not use "=" in docker tags (forbidden since 1.3)